OSPF router support the ability to set the LSA refresh time on non-DNA LSAs.
If you are in a normal environment that the admin does this to decrease the
number of LSA refreshes versus the drastic steps to using DNA LSAs. What is
LSA refresh time? Is it same on all routers? Did you change it somewhere or
on some router?
Regards,
Masood Ahmad Shah
http://www.weblogs.com.pk/jahil/
-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Kumar, Prashanth
Sent: Thursday, November 29, 2007 8:16 AM
To: cisco-nsp at puck.nether.net
Subject: [c-nsp] ospf external route showing as updated quite so often in
routing table
I have a situation where all ospf external routes on multiple cisco
routers showing update time refreshed. It is as if the routing table for
those routes are updated 4 to 10 sec ago. I don't think
Routes are flapping as some of routes are only one hop away. I am wondering
if there is something in network causing this or is it a IOS issue. I
checked
this on bunch of cisco 65xx and 38xx. All are showing the same symptom.
Any help would be appreciated. Routers are running different IOS ver
12.2 line. There is no network issue or
high cpu I have noticied on all these routers.
Thx
Prashanth
If I do a show ip route
xxxxxxxxxx#sh ip route 159.153.4.4
Routing entry for 159.153.4.4/32
Known via "ospf 1", distance 110, metric 202, type extern 1
Redistributing via bgp 64700
Last update from 10.21.252.41 on GigabitEthernet0/0, 00:00:04 ago
Routing Descriptor Blocks:
* 10.21.252.41, from 10.14.0.24, 00:00:04 ago, via GigabitEthernet0/0
Route metric is 202, traffic share count is 1
After 10 sec
xxxxxxxxxx#sh ip route 159.153.4.4
Routing entry for 159.153.4.4/32
Known via "ospf 1", distance 110, metric 202, type extern 1
Redistributing via bgp 64700
Last update from 10.21.252.41 on GigabitEthernet0/0, 00:00:00 ago
Routing Descriptor Blocks:
* 10.21.252.41, from 10.14.0.24, 00:00:00 ago, via GigabitEthernet0/0
Route metric is 202, traffic share count is 1
But show ip ospf database external 159.153.4.4 shows LSA age incrementing
Type-5 AS External Link States
Routing Bit Set on this LSA
LS age: 627
Options: (No TOS-capability, DC)
LS Type: AS External Link
Link State ID: 159.153.4.4 (External Network Number )
Advertising Router: 10.14.0.24
LS Seq Number: 8000ECE2
Checksum: 0x6323
Length: 36
Network Mask: /32
Metric Type: 1 (Comparable directly to link state metric)
TOS: 0
Metric: 110
Forward Address: 0.0.0.0
External Route Tag: 0
_______________________________________________
cisco-nsp mailing list cisco-nsp at puck.nether.net
https://puck.nether.net/mailman/listinfo/cisco-nsp
archive at http://puck.nether.net/pipermail/cisco-nsp/